Security readout for executives and security teams
Plain-English summary
CVE-2018-9428 is a memory corruption flaw in Android 8.1 audio handling. A local attacker could potentially execute code on the device without extra privileges. The supplied record says user interaction is needed, but its CVSS vector says none; that inconsistency should be treated as unresolved.
Executive priority
Treat as high priority where Android 8.1 remains deployed. Business urgency is lower for fully updated or retired devices, but unmanaged legacy devices may carry material endpoint compromise risk.
Technical view
The issue is a possible out-of-bounds write caused by use-after-free in startDevice of AAudioServiceStreamBase.cpp. The reported impact is local arbitrary code execution with high confidentiality, integrity, and availability impact. The affected product listed is Google Android 8.1.
Likely exposure
Exposure is most likely on legacy Android 8.1 devices, embedded builds, custom ROMs, or OEM images missing the Android 2018-07-01 security bulletin fixes. The source bundle does not identify other affected versions or products.
Exploitation context
The CVE is local, not remote network exploitable based on the CVSS vector. KEV status is false in the supplied bundle, and no cited source confirms active exploitation. User interaction evidence is inconsistent between the description and CVSS vector.
Researcher notes
Key uncertainty is the interaction requirement: the text says interaction is needed, while CVSS lists UI:N. Do not assume active exploitation or broader product impact from the supplied evidence. Focus validation on patch provenance for Android 8.1 builds.
Mitigation direction
- Apply vendor Android security updates covering the 2018-07-01 bulletin.
- Prioritize remediation for Android 8.1 devices still in production.
- Retire or isolate devices that cannot receive vendor security updates.
- Check OEM guidance for backported fixes on customized Android builds.
Validation and detection
- Inventory devices and images running Android 8.1.
- Verify Android security patch level includes July 2018 fixes or later.
- Confirm OEM firmware includes the referenced Android bulletin remediation.
- Review mobile management data for unmanaged legacy Android devices.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-9428 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H2.55.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.4HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://source.android.com/security/bulletin/2018-07-01CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.